A study of pollutant dispersal in a 2-dimensional field including gravity effects
Abstract
The effect of gravity forces on turbulent development is investigated both experimentally and numerically. In the experimental investigation, helium gas is released into an air stream. The experiment is carried out in a low speed, low turbulence wind tunnel. The He is released through an area source. Two configurations are investigated: He released from the top of the section and He released from the bottom of the section. Three different free stream turbulence levels are investigated at two free stream velocities. Numerically, the conservation of mass equation, written for a system of two species, is solved. The turbulent diffusion terms are modelled with a gradient flux model, constant coefficient of diffusivity. Comparisons are made with the experimental data, comparing effects of changing turbulent intensity, free stream velocity and buoyancy.
- Publication:
-
Final Scientific Report
- Pub Date:
- June 1984
- Bibcode:
- 1984vkif.rept.....B
- Keywords:
-
- Contaminants;
- Dispersing;
- Flow Distribution;
- Gravitation;
- Pollution Transport;
- Turbulent Flow;
- Coefficients;
- Comparison;
- Conservation Equations;
- Dimensions;
- Free Flow;
- Helium;
- Lasers;
- Velocity Measurement;
- Wind Tunnel Tests;
- Fluid Mechanics and Heat Transfer